jcb JS130, Service Manual

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41 - 2
Section E Hydraulics
9803/6410
Section E
41 - 2
Issue 1
Remote Control Valve (Services)
Dismantling and Assembly (cont’d)
Dismantling (cont’d)
7 Remove mounting screws (4 off) and lift out control
valve.
8 Clean the valve exterior using approved solvent and
using soft metal pads for protection, clamp the valve
body into a vice.
9 If the return springs 15 are weak, the sliding resistance
of the seal 9 will cause the guides 8 to stick in the
casing. Using a screw driver, carefully ease out the
guides
8 and plungers 11 .
Note: Care must be taken to prevent damage to the guides
when removing. Ensure the guides do not fly out due to the
force of the return springs.
10 Remove spring seats 13 , split washers 12 , return
springs 15 , pressure control springs 14 and spools 17 .
Note: Identify each set of parts and their locations for
assembly.
11 Slacken and remove body assembly screw 6 . Remove
and discard ‘O’-ring 7 .
12 Separate upper and lower body sections 1 and 2 and
remove dowel pins 5 .
13 Remove and discard ‘O’-rings 3 and 4 .
14 Hold spools 17 firmly on the work bench and depress
spring seat 13 and remove split washers 12 .
Note: Avoid scratching the surface of the spools. Do not
depress the spring seats more than 6 mm (0.24 in).
15 Separate spools 17 , spring seats 13 , springs 14 and 15
and shims 16 .
16 Remove plungers 11 from guides 8 .
17 Remove seals 9 and 10 from guide 8 and discard.
Note: Leave all parts to soak in suitable solvent until dirt is
loosened. Using clean solvent wash all parts and allow to air
dry. Apply rust inhibitor to all parts.